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Liu S.,South China University of Technology | Liu S.,South China Normal University | Qi D.,South China University of Technology | Meng J.,Guangdong Communication Polytechnic | Liu B.,Guangdong University of Technology
International Journal of Digital Content Technology and its Applications | Year: 2012

Wireless sensor networks (WSNs) are usually deployed in the non-controlled environment without maintenance, facing the danger of information disclosure, tampering, replay attacks, denial of service and other threats, it makes collaboration among WSN nodes becomes more and more vital. Some common trust collaboration model is analyzed and summarized in this paper firstly, after studying the collaboration of the ant colony system, the trust model based on Biologically-inspired Trust and Reputation Model (BTRM) used for wireless sensor networks is put forward, also the features and architecture of the simulation system is proposed. This paper describes BTRM theory and the design and implementation of simulation system in detail. The simulation shows the output average path length, the average satisfaction, the average deviation and so on is more satisfied with the improvements.

Liu X.,Zhongshan Polytechnic | Huang X.,Guangdong Communication Polytechnic
Advanced Materials Research | Year: 2011

This paper introduces the design of front circuit in cleaning grain loss monitoring and control system for a new electric combine harvester. This front circuit mainly includes signal conditioning circuits which are amplification circuit, anti-jamming circuit and filter circuit for transforming sensor output signal. 8031 single-chip is used as its core and implemented automatic monitoring of the cleaning grain loss. Owing to adopt the modular design method and mature technology, the circuit is powerful in function and easy to realize and has extensive value in use. The simulation results show that the effect is excellent and performance is stable. © (2011) Trans Tech Publications.

Cao C.,South China University of Technology | Cui F.,GuangDong Communication Polytechnic | Guo G.,GuangDong Communication Polytechnic
Applied Mechanics and Materials | Year: 2010

This paper proposes a two-direction green wave control algorithm of traffic signal based on particle swarm optimization. The traffic flow model of queuing length and two-direction green wave control object function were built. The signal split and the phase offset were optimized by particle swarm optimization. The simulation result with traffic data collected from Liansheng Road in Dongguan City proved this method was effective and practical. Compared with graphical method and actuate signal control, the proposed algorithm could effectively reduce delaying time and shorten queuing length. © (2010) Trans Tech Publications.

Luo S.,Guangdong Communication Polytechnic | Liu W.,Guangdong Communication Polytechnic | Deng Z.S.,Guangdong Communication Polytechnic
Green Building, Materials and Civil Engineering - Proceedings of the 4th International Conference on GreenBuilding, Materials and Civil Engineering, GBMCE 2014 | Year: 2015

This paper improved the double Tuned Mass Damper (TMD) system to reduce the frequency sensitive problem of single TMD system. In the mitigation model, as a rule of thumb, we placed two identical TMD on a stay cable at the three points of division. FEM investigation shows that double TMD system could control the cable vibration problem more efficiently than the single TMD system, and furthermore reduce the frequency sensitive problem. © 2015 Taylor & Francis Group, London, UK.

Cai P.,Guangdong Communication Polytechnic | Tu J.,Guangdong Communication Polytechnic
Wuhan Ligong Daxue Xuebao (Jiaotong Kexue Yu Gongcheng Ban)/Journal of Wuhan University of Technology (Transportation Science and Engineering) | Year: 2014

For the effective deployment of empty container in port, in order to improve the utilization efficiency of container leasing company, and to obtain good economic benefit, this paper constructs the three game model of empty containers scheduling in port, and carried on the empirical analysis to obtain: under the unified dispatching of ports (empty container has allocated between ports) and under separate scheduling (empty container has allocated between ports under the company headquarters to establish between the ports of transshipment price) of the two kinds of scheduling policy has the same operation results in five kinds of scheduling policy. Dispatching them in five strategy is optimal, which can get the company overall minimum container stock, the overall effect of maximum profit.

Jiang Y.,Guangdong Communication Polytechnic | Wang J.,Guangdong Communication Polytechnic
Modern Tunnelling Technology | Year: 2013

At present, the seismic coefficient method is often adopted in the aseismic design of most shield tunnels in China. In this paper, the response displacement method is introduced to calculate the increments of internal force in a lining under seismic loading, while the internal force in a lining under normal conditions is calculated by taking into account the crown pressure and the pore water pressure. Then, by means of the superposition of the above two kind of forces, the total internal force in the lining under seismic loading is obtained, and the aseismic design of a shield tunnel is conducted based on all these factors. Compared with the calculation results of the finite element method and the seismic coefficient method, it shows that the response displacement method can be applied to the lining strength calculations for the aseismic design of shield tunnels and the major positive internal force and negative internal force would emerge every 30° starting from the vertical axis under seismic loading, which requires special consideration in the aseismic design of a tunnel cross section.

Xu K.Y.,Guangdong Communication Polytechnic
Applied Mechanics and Materials | Year: 2014

Earthquake is a kind of natural disaster which is difficult to predict and the damage degree is very great, occurrence of the strong motion often leads to the tremendous life and property loss. Bridge is very important lifeline engineering and it is very necessary to conduct the comprehensive and systemic investigation on the bridge aseismic. In this paper, the FEM model of a long-span cable-bridge was established; the dynamic characteristic and nonlinear seismic responses under uniform and non-uniform excitations of it were systematic studied. The results show that: 1) the basic cycle of it is about 8.881s. Its first mode of vibration is longitudinal floating mode, which is favorable to the earthquake- response of structures. 2) Its former 40 rank frequency are located between 0.1~2Hz which is avail to the condition of traffic condition.3) the geometric nonlinearity has much influence on the response of this kind of bridge.4) the seismic responses are sensitive to the frequency spectra of the input earthquake wave. 5) The traveling wave excitations are unfavorable to the design of tower and the main girder when considering the three orthogonal seismic wave input. In order to get correct results, artificial seismic wave of the bridge address is necessary to the time-history analysis. © (2014) Trans Tech Publications, Switzerland.

Li Y.,Jinan University | Qi P.,Guangdong Communication Polytechnic | Ma X.,Jinan University | Zhong J.,Jinan University
European Food Research and Technology | Year: 2014

Clenbuterol hydrochloride (CLB) is a kind of lean meat powder which can increase the conversion rate of lean meat. Though it is allowed in human and veterinary medicine, CLB is harmful for human body and, therefore, is restricted to its use as a growth promoter. In this paper, a quick detection technique for clenbuterol hydrochloride is proposed. The technique, which is based on surface plasmon resonance (SPR) and immune reaction, includes two methods, the direct method and the suppression method. The direct method can be applied, to screen an antibody and in the study of the dynamic reaction. For the immune suppression method, the concentration of CLB is inversely proportional to the change of SPR angle. The detection limit of this method is smaller than 2 μg/L, and the pork extraction is detected. The concentration of CLB in the sample is 2.75 μg/L, and the concentration of antibody is 250 μg/L. The detection of CLB by SPR is quick, highly sensitive, and label free. And the utilized equipment is cheap, simple, environmental friendly, and easy to control. The proposed technique could achieve the real-time detection of a large number of samples and be widely used to detect CLB in all fields of food processing. Therefore, this method is expected to be used in the inspection process for foods in the supermarket, bazaar, and factory. © 2014 Springer-Verlag Berlin Heidelberg.

Li Y.,Jinan University | Ma X.,Jinan University | Zhao M.,Jinan University | Qi P.,Guangdong Communication Polytechnic | Zhong J.,Jinan University
PLoS ONE | Year: 2014

Coumaphos is a common organophosphorus pesticide used in agricultural products. It is harmful to human health and has a strictly stipulated maximum residue limit (MRL) on fruits and vegetables. Currently existing methods for detection are complex in execution, require expensive tools and are time consuming and labor intensive. The surface plasmon resonance method has been widely used in biomedicine and many other fields. This study discusses a detection method based on surface plasmon resonance in organophosphorus pesticide residues. As an alternative solution, this study proposes a method to detect Coumaphos. The method, which is based on surface plasmon resonance (SPR) and immune reaction, belongs to the suppression method. A group of samples of Coumaphos was detected by this method. The concentrations of Coumaphos in the samples were 0 μg/L, 50 μg/L, 100 μg/L, 300 μg/L, 500 μg/L, 1000 μg/L, 3000 μg/L and 5000 μg/L, respectively. Through detecting a group of samples, the process of kinetic reactions was analyzed and the corresponding standard curve was obtained. The sensibility is less than 25 μg/L, conforming to the standard of the MRL of Coumaphos stipulated by China. This method is label-free, using an unpurified single antibody only and can continuously test at least 80 groups of samples continuously. It has high sensitivity and specificity. The required equipments are simple, environmental friendly and easy to control. So this method is promised for a large number of samples quick detection on spot and for application prospects. © 2014 Li et al.

Xu K.,Guangdong Communication Polytechnic | Zhong J.,Guangdong Communication Polytechnic
Wuhan Ligong Daxue Xuebao (Jiaotong Kexue Yu Gongcheng Ban)/Journal of Wuhan University of Technology (Transportation Science and Engineering) | Year: 2015

Combined with practical engineering, through computational analysis, the reason for the disease of simply supported T beam bridge are conducted in-depth discussion and analysis, specific measures are proposed to deal with the reinforcement design, and strengthening the efficiency of the programs, construction safety, cost, etc. were demonstrated. The optimal solution is obtained. ©, 2015, Wuhan University of Technology. All right reserved.

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